html,
body {
    height: 100%;
    font-weight: 400;
    font-family: Helvetica Neue, Helvetica, PingFang SC, Hiragino Sans GB,
        Microsoft YaHei, '\5FAE\8F6F\96C5\9ED1', Arial, sans-serif;
}

body {
    position: relative;
}

* {
    margin: 0;
    padding: 0;
    list-style: none;
}

.clearfix::after {
    content: "";
    display: block;
    overflow: hidden;
    clear: both;
    visibility: hidden;
}

a {
    text-decoration: none;
    color: black;
}